RZ7899-MS Overview
The MSKSEMI RZ7899-MS is a high-current bidirectional brushed DC (BDC) motor driver IC integrating a full H-bridge with two logic input control pins, built-in freewheeling diodes, and a comprehensive protection suite — all within a standard SOP-8 package. Operating from 3V to 30V, the device spans a wide enough supply range to cover single-cell Li-ion, multi-cell NiMH, 12V lead-acid, and 24V industrial DC rail applications from a single IC SKU. The RZ7899-MS is capable of sustaining a maximum continuous output current of 6A, making it one of the higher-current solutions available in the SOP-8 footprint category.
A defining electrical characteristic of the RZ7899-MS is its extremely low RDS(ON) of 80mΩ, which keeps power dissipation and device heating to a minimum even at rated current, reducing or eliminating the need for external heatsinking in many application scenarios. The device’s two logic input terminals (IN1, IN2) map directly to forward rotation, reverse rotation, coast, and active brake states, compatible with standard microcontroller GPIO and PWM outputs without any additional level-shifting logic. Built-in freewheeling diodes safely dissipate the inductive reverse surge currents generated by motor windings during switching transitions, protecting the H-bridge switches from voltage spikes. Standby current is specified below 1µA — a significant advantage in battery-operated products where the motor driver spends the majority of its time in an idle state.
The MSKSEMI RZ7899-MS integrates thermal shutdown, overcurrent limiting, and short-circuit protection, providing a robust, self-protecting motor drive solution that reduces system-level protection BOM. The device is RoHS-compliant with a 100% lead-free lead frame, making it suitable for CE-marked and environmentally compliant end products across the EU and UK markets.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | RZ7899-MS |
| Manufacturer | MSKSEMI |
| Supply Voltage (VCC) | 3V to 30V |
| Maximum Continuous Output Current (Iout) | 6A |
| On-Resistance (RDS(ON)) | 80mΩ |
| Standby Quiescent Current (Iq) | 1mA (operating); <1µA (standby) |
| Input Interface | 2× logic input (IN1/IN2) |
| Control Modes | Forward, reverse, brake, coast |
| Motor Type Supported | Single brushed DC (BDC) |
| Freewheeling Diodes | Built-in (inductive load protection) |
| Protection Features | Thermal shutdown, overcurrent limiting, short-circuit protection |
| Package | SOP-8 |
| RoHS / Lead-Free | Yes — 100% lead-free lead frame |
Applications
The MSKSEMI RZ7899-MS is suited to any application requiring reliable, high-current bidirectional brushed DC motor control across a wide supply voltage range. Core application areas include toy motor drives, automatic pipeline and HVAC valve actuators, electromagnetic door lock and access control mechanisms, automotive window lift and seat adjustment motors, and small home appliance drives. Its 30V maximum supply rating and 6A continuous current capability also make it appropriate for 12V/24V industrial conveyor and material handling drives, power tool triggers, and battery-powered robotic platforms where a compact, self-protecting single-chip motor driver is preferred over a discrete MOSFET H-bridge implementation.
Pin-to-Pin Compatible Alternatives
Substituting an established brand motor driver with the pin-to-pin compatible RZ7899-MS enables procurement teams to reduce per-unit BOM cost and diversify supplier base without any PCB layout revision or firmware modification.
| Reference Part Number | Original Manufacturer | Why Choose RZ7899-MS |
|---|---|---|
| DRV8871 | Texas Instruments | RZ7899-MS delivers lower RDS(ON) (80mΩ vs 565mΩ typical) for significantly reduced conduction losses at equivalent load current |
| TB6612FNG | Toshiba | Pin-compatible SOP-8 replacement with 6A continuous current rating versus 1.2A for the TB6612FNG, supporting higher-power single-motor applications |
| TC78H660FTG | Toshiba | Direct footprint-compatible alternative; MSKSEMI RZ7899-MS offers a substantially higher output current ceiling and lower on-resistance at competitive cost |
| A4950 | Allegro MicroSystems | Compatible bidirectional DC motor drive function; RZ7899-MS provides sub-1µA standby current versus the A4950’s higher quiescent current, benefiting battery-powered designs |
Frequently Asked Questions
Is RZ7899-MS RoHS compliant?
Yes. The MSKSEMI RZ7899-MS is fully RoHS-compliant under the RoHS Directive (2011/65/EU) and features a 100% lead-free lead frame, making it suitable for CE-marked products and environmentally regulated markets including the EU and UK. Compliance documentation is available upon request through ABL Semi.
What are the pin-to-pin replacements for RZ7899-MS?
The RZ7899-MS is a pin-to-pin compatible replacement for several widely specified brushed DC motor drivers including the TI DRV8871, Toshiba TB6612FNG, Toshiba TC78H660FTG, and Allegro A4950. Please refer to the compatibility table above for a specific technical and commercial rationale for each substitution.
What is the minimum order quantity (MOQ) for RZ7899-MS?
ABL Semi offers flexible MOQ for RZ7899-MS, supporting both prototype quantities and mass production orders. Contact us for current stock and pricing.
What package options are available for RZ7899-MS?
The MSKSEMI RZ7899-MS is available in the standard SOP-8 package, a widely adopted 8-pin small-outline format fully compatible with conventional SMT reflow assembly processes. Contact ABL Semi to confirm current stock availability and lead times.
Does the RZ7899-MS support PWM-based motor speed control?
Yes. The RZ7899-MS accepts PWM signals on its logic input pins (IN1/IN2) directly from a microcontroller, allowing proportional motor speed control by varying the PWM duty cycle. Forward speed, reverse speed, active braking, and coast modes are all achievable through the IN1/IN2 pin state combinations, with no external logic gates or level shifters required for standard 3.3V or 5V MCU interfaces operating within the device’s 3V–30V supply range.
For complete product specifications, please refer to: